Friend flirts with me in front of others but not alone?

I have a guy friend who I was close to for a few months until I realized I might be on the back burner. I pulled back and he has noticed, texting or calling every once in a while to tell me how he misses me and how we never talk.

Well as it happens I have noticed a bit of a pattern lately. He likes to flirt with me physically in front of our friends or when tipsy (sneak-tapping my opposite shoulder, tapping my thigh to emphasize a point, sneaking up behind me or joining my circle of conversation.) When we're alone however he gets nervous, like its hard for him to keep the convo going (I usually have to open or lead the topic of conversation) or his body language gets all twisted (his toes press inwards while seated, he fidgets and points out random things, etc.)

So what's the deal? I don't think he's into me and I stopped calling him, but he still initiates once a week or so to hint that he misses our old closeness and wants to see me but never offering a date or time.
Friend flirts with me in front of others but not alone?
Post Opinion